<div dir="ltr">I hope I'm not insulting by linking to an explanation, but I think it would help if you think about water displacement and how a less dense object floats in water. It is the same exact principle when you have a less dense object (the helium balloon) compared to the air:<div><br></div><div><a href="http://science.howstuffworks.com/helium1.htm">http://science.howstuffworks.com/helium1.htm</a><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Oct 13, 2017 at 11:49 AM, William Flynn Wallace <span dir="ltr"><<a href="mailto:foozler83@gmail.com" target="_blank">foozler83@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Thu, Oct 12, 2017 at 8:56 PM, Mike Dougherty <span dir="ltr"><<a href="mailto:msd001@gmail.com" target="_blank">msd001@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><span><div class="gmail_extra" dir="auto"><div class="gmail_quote">On Oct 12, 2017 7:45 PM, "William Flynn Wallace" <<a href="mailto:foozler83@gmail.com" target="_blank">foozler83@gmail.com</a>> wrote:<br type="attribution"><blockquote class="m_4337352916019097516m_4833075520793438044quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">I also thought about something not in the book: why does a helium balloon rise? Don't tell l me it's lighter. My cat is lighter than I am and he is not flying around. The gas inside the balloon must be exerting pressure in every direction, so the force cannot be from there. Where is the force here??</div></div></blockquote></div></div><div dir="auto"><br></div></span><div dir="auto">Do you not know this or are you cleverly feigning to test the list for science blindness? </div></div></blockquote></div></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(0,0,0);display:inline">------------</div></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(0,0,0);display:inline">Ah, if only I were that clever. Even if I were, I'd not pull that on y'all. I just do not understand buoyancy. Another example from the book has a table pushing upwards against a book lying on it. Don't get that either. Don't see where the force is coming from.</div></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(0,0,0);display:inline"><br></div></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(0,0,0);display:inline">Lighter things rise. I get that. I just don't see why.</div></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(0,0,0);display:inline"><br></div></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(0,0,0);display:inline">bill w</div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div class="gmail_extra" dir="auto"></div></div>
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